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* [gcc r14-9762] analyzer: prevent ICEs with null types
@ 2024-04-02 21:47 David Malcolm
0 siblings, 0 replies; only message in thread
From: David Malcolm @ 2024-04-02 21:47 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:e945d322fcbc68f91388b1d1297bdf6a6c6fcbaa
commit r14-9762-ge945d322fcbc68f91388b1d1297bdf6a6c6fcbaa
Author: David Malcolm <dmalcolm@redhat.com>
Date: Tue Apr 2 17:42:16 2024 -0400
analyzer: prevent ICEs with null types
Fixes some ICEs seen analyzing the Linux kernel.
gcc/analyzer/ChangeLog:
* region-model-manager.cc (maybe_undo_optimize_bit_field_compare):
Guard against null types.
* region-model.cc (apply_constraints_for_gswitch): Likewise.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
Diff:
---
gcc/analyzer/region-model-manager.cc | 2 ++
gcc/analyzer/region-model.cc | 3 ++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/gcc/analyzer/region-model-manager.cc b/gcc/analyzer/region-model-manager.cc
index 4feb349c914..f155eeb87c0 100644
--- a/gcc/analyzer/region-model-manager.cc
+++ b/gcc/analyzer/region-model-manager.cc
@@ -616,6 +616,8 @@ maybe_undo_optimize_bit_field_compare (tree type,
tree cst,
const svalue *arg1)
{
+ if (!type)
+ return nullptr;
if (!INTEGRAL_TYPE_P (type))
return NULL;
diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc
index 902b887fc07..98f287145c6 100644
--- a/gcc/analyzer/region-model.cc
+++ b/gcc/analyzer/region-model.cc
@@ -5781,7 +5781,8 @@ apply_constraints_for_gswitch (const switch_cfg_superedge &edge,
&& is_a <const initial_svalue *> (unaryop->get_arg ()))
if (const initial_svalue *initvalop = (as_a <const initial_svalue *>
(unaryop->get_arg ())))
- if (TREE_CODE (initvalop->get_type ()) == ENUMERAL_TYPE)
+ if (initvalop->get_type ()
+ && TREE_CODE (initvalop->get_type ()) == ENUMERAL_TYPE)
{
index_sval = initvalop;
check_index_type = false;
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